During a week-long meditation retreat, twins showed changes in gene expression, metabolites, and cytokines in blood plasma that varied with the timing of assessment. Twin pairs began the retreat with similar molecular and brain-activity profiles, diverged at the midpoint, and converged again by the end. Even when in separate rooms, twin pairs exhibited significant correlations in brain-wave (spectral power) patterns, and heart rate dynamics aligned more closely in twin pairs than in unmatched pairs. These findings suggest that meditation may influence biological markers and that genetic background contributes to these responses.
Mystical states induced by psychedelics, meditation, or fasting all converge on the same brain state: a transient near-critical regime. Serotonergic psychedelics relax top-down priors by sensitizing layer 5 pyramidal neurons; open-monitoring meditation elevates cortical entropy through altered thalamocortical connectivity; caloric restriction destabilizes the default mode network by attenuating metabolic support for high-level attractors. The depth of the mystical state, not the method of induction, predicts lasting therapeutic benefit, suggesting conscious experience itself is the mechanistic agent of change. This framework proposes that near-critical dynamics may allow field-theoretic and quantum-coherent contributions to consciousness to become detectable.